Grid structure



Nov. 9 ,1926.

1.; R. McAFoos GRID STRUCTURE Filed Feb. 12, 1926 2 SheetS- -Sheet 1 w ATTORNEY Nov. 9;1926. 1,606,434

L. R. MAFQO$ GRID STRUCTURE Filed Feb. '12. 1926 2 Sheets-Sheet 2 g g- 7 4-6 XI {1-1, 50141 7 V I 7 W ATTORNEY IN VEN TOR.

' in place as follows.

In Fig. l I show the lower side of the girder bars may be conveniently spliced without sacrifice of strength or rigidity.

Thus in Fig. 1 I have shown two alined girder bars 1 with their ends sufficiently spaced apart to provide clearance for the head 8 of one through-bolt and the threaded end and the nut 9 of the other through-bolt. Inl ig. 3, 11 represents a splice bar of proper cross sectional shape to fit into the interior of the alined girder bars below the grating bars l. The splice bar 11 is held in place by the transverse bolts 12 which extend through alined holes in the opposite walls of the girder bar and of the splice bar 11. I make the splice bar of sufricient length so it can be provided with two bolts at each end. It is thus evident that the grating can be made in sections of convenient dimensions to handle and place in position and the splice bars may then be installed and bolted in place. In Fig. 1 at girder connections the top section of girder is notched out to provide for a washer and nut on each through-bolt for tightening grating bars in each section of grating where splice bar 11 connects same.

Referring to Figs. 6 and 7 I show the de- "elopment of my grating structure as a gate.

the girder bars being horizontally disposed to form the rails of the fence while the grating bars are vertically disposed to form the pickets. I may hingedly support the gate 13 represents. end extensions of the rear portions of the girder bars 1, forming upper and lower perforated ears between which the bars 14, extending horizontally from the post 15 are inserted,

16 being pivot bolts extending down through the perforation in the ears 13 and an alined hole in the'bar 14.

In Figs. 8 and 9 I have illustrated the development of my invention as a window'or bank grating, the grating bars 4 being channel shaped with their closed side disposed outwardly to cause a broader bar effeet.

In Figs. 10 and 11 I have shown T-shaped grating bars 4 used, the arm of the T being outwardly while the stem of the T is inserted in and bears against'the ends of the slots 3 in the girder bar 1. WVhere great strength is necessary, as where considerable weight is to be sustained, or a strong barrier is to be provided the girder bars 1 may be braced by means of sleeves 17f which; are

interposed between the side walls of the girder bars with the ends of the sleeve registering with holes in said side walls and bolts 18 being inserted through the same and tightened.

In Figs. 12 and 13 I show a convenient form of metal fence in which my invention is used, the vertical pickets 4 being clamped in assemblage with the gird-er bars 1 or by means of the through-bolts 6 in the manner above described.

1'9 represents the post which may be conveniently of T-shaped cross section with the stem of the T extending rearwardly and having bolted or otherwise attached thereto on either side the angular brackets 20, whose horizontal portions extend into the interiors of the girder bars 1 and support the same in place, filler blocks 21 filling the space within the girder bars below the brackets and bolts 22 passing through the assembled parts to clamp them in place. This forms a very strong fence structure.

In Figs. 14', 15 and 16 I show the use of a hollow or boX post 23 through which er;- tends the horizontal splice bars 24: whose ends occupy the ends of the girder bars 1 and are clamped therein by the bolts 25.

My grating structure, as is apparent, is

very simple in construction and can be easily assembled by one unskilled in the use of tools. It can be as easily disassembled. It is of greatstrength and lends itself to a great many character of purposes for which metallic grating structures are used.

hat I desire to claim is 1. In a grating structure for the purposes described, the combination of plurality of parallel grating bars, a girder bar positioned angularly thereto and provided with a plurality of transverse slots in which the grating bars are inserted, said grating bars being provided with holes which are alined when the grating bars are in place, and a through-bolt parallel with the girder bar and extending through the holes in the grating bars.

2. In agrating structure for the purposes described, the combination of a plurality of parallel grating bars, a girder bar positioned angularly thereto and provided with a plurality of transverse slots in which the grating bars are inserted, said grating bars being provided with holes which are alined when the grating bars are in place, a through-bolt parallel with the girder bar and extending through the holes in the grating bars, and means for holding said bolts in position.

3. In a grating structure for the purposes described, the combination of a plurality of parallel grating bars, a girder bar positioned angularly thereto and provided with a plurality of transverse slots in which the grating'bars are inserted, said grating bars being provided with holes which are alined when the grating bars are in place, a through-bolt parallel with the girder bar and extending through the holes in the grating bars, and washers engaging said girderbar and against which the through-bolt is tightened to hold it rigidly in position.

5 In a grating structure for the purposes described, the. combination of a plurality of girder bars of substantially U-shape disposed in parallel and spaced relation and provided with transverse slot-s, grating bars supported in said slots and having holes positioned within the girder bars, and through-bolts extending longitudinally within the girder bars and extending through the holes in the grating bars.

5. In a grating structure. for the purposes described, the combination of a plurality of girder bars of substantially U-shape disposed in parallel and spaced relation and provided with transverse slots, grating bars supported in said slots and having holes positioned within the girder bars, throughbolts extending longitudinally within the the girder bars and extending through the holes in the grating bars, and means for fixing said througlrbolts in position rela- 'tive to the girder bars.

6. In a grating structure for the purposes described, the combination of -a plurality of girder bars of substantially U-shape disposed in parallel and spaced relation and provided with transverse slots, grating bars supported in said slots and having holes positioned within the girder bars, throughbolts extending longitudinally within the gird-er bars and extending through the holes in the grating bars, and washers positioned at the ends of the girder bars, through which the through-bolts pass and against which said bolts are tightened.

'l. A spliced grating structure for the purposes described comprised of substantially ll-shapod girder bars in alineinent and each provided with transverse slots, grating bars clamped in said slots, and a splice bar overlapping the alined girder bars having its ends secured within the hollow ends of the alined girder bars.

8. A. spliced grating structure for the purposes described comprised of substantially U-shaped girder bars in alinement and each provided with transverse slots, grating bars clamped in said slots, and a splice bar over lapping the alined girder bars having its ends within the hollow ends of the alined girder bars and bolts extending through holes in the walls of said girder bars and the splice bars to clamp the elements together.

9. In a grating structure, the combination of a pair of parallel and spaced apart girder bars of substantially U-shape and provided with transverse slots, grating bars disposed angularly to said girder bars and occupying said slots, said grating bars being pro vided with bolt holes which are alined with said girder bars and through-bolts extending within said girder bars and inserted through said holes to hold the grating bars in position.

10. In a grating structure, the combination of a pair of parallel and spaced apart girder bars of substantially U-shape and provided with transverse slots, grating bars disposed angularly to said girder bars and occupying said slots, said grating bars being provided with bolt holes which are alined with said girder bars, througlrbolts extending within said girder bars and inserted through said holes to hold the grating bars in position, a fixed element, connecting bars extending from said fixed element into the interior of said girder bars, and means for securing said connecting bars to said girder bars.

11. In a grating structure, the combination of a pair of parallel and spaced apart girder bars 01 substantially lJ-shape and provided with transverse slots, grating bars disposed angularly to said girder bars and occupying said slots, said grating bars being provided with bolt holes which are alined with said girder bars, through-bolts extending within said girder bars and inserted through said holes to hold the grating bars in position, a fixed element, connecting bars extending from said fixed element into the interiors of said girder bars, and pivotal connections between said connecting bars and said girder bars whereby the grating structure is hinged to said fixed support.

Signed at Pittsburgh, Pa., this 1st day of February,'l926.

LAWRENCE R. MOAFOOEB. 

